Advisories ยป MGASA-2018-0180

Updated libtiff packages fix security vulnerabilities

Publication date: 19 Mar 2018
Type: security
Affected Mageia releases : 5 , 6
CVE: CVE-2017-11613 , CVE-2018-5784


In LibTIFF 4.0.8, there is a denial of service vulnerability in the
TIFFOpen function. A crafted input will lead to a denial of service
attack. During the TIFFOpen process, td_imagelength is not checked. The
value of td_imagelength can be directly controlled by an input file. In
the ChopUpSingleUncompressedStrip function, the _TIFFCheckMalloc
function is called based on td_imagelength. If we set the value of
td_imagelength close to the amount of system memory, it will hang the
system or trigger the OOM killer. (CVE-2017-11613)

In LibTIFF 4.0.9, there is an uncontrolled resource consumption in the
TIFFSetDirectory function of tif_dir.c. Remote attackers could leverage
this vulnerability to cause a denial of service via a crafted tif file.
This occurs because the declared number of directory entries is not
validated against the actual number of directory entries. (CVE-2018-5784)